fact
n 1: a piece of information about circumstances that exist or
events that have occurred; "first you must collect all
the facts of the case"
2: a statement or assertion of verified information about
something that is the case or has happened; "he supported
his argument with an impressive array of facts"
3: an event known to have happened or something known to have
existed; "your fears have no basis in fact"; "how much of
the story is fact and how much fiction is hard to tell"
4: a concept whose truth can be proved; "scientific hypotheses
are not facts"